CVEvulnerability

CVE-2026-19538

8.2 HIGH Published 2026-08-26 Modified 2026-09-08 Official page ↗
Status
Analyzed
Published
2026-08-26
Last modified
2026-09-08
Assigner
[email protected]
CVSS 4.0 ([email protected])
8.2 HIGH — CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-290, CWE-672

Description

The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.

Affected configurations

• nlnetlabs nsd (>= 4.8.0 < 4.15.1)

Related

Weakness · CWE (2)

  • CWE-290 Authentication Bypass by Spoofing weakness
  • CWE-672 Operation on a Resource after Expiration or Release weakness

References